Thermometer



per up 1W W li mail it annali/roumaine.

realiseer.

i application filed lllay 28,

l 'o all zu/0m t may concern lde it known that l, lllnnennr l?.lllinnnn, a citizen ot the United States, and resident of the borough otllroolilyn, county ot lfings, city and tritate oit lleiv lork, haveinvented certain new and useitul improvements in llherniometers, ofwhich the 'following is a s}, ecilication. i

lilly invention relates to thermometers and more particularly to thattype thereo'l commonly used for indicating atmospheric temijieratures. in

lll his type oit thermometers, in many exist ing terms, incllnles ascale plate or baci; ot metal with a proper scale produced thereon and athermometer tube located on said plate in proper cooperative relation tosaid scale. ln order to maintain the accuracy of the instrument it isessential that the tube remain ixed, particularly against lengthwisemovement, relatively to said scale, in order that the fluid column insaid tube and said scale may properly cooperate to provide a correctreading. l'leretotore considerable diiliculty has been experienced insecuring this fixture of the tube on the plate, several kinds ot deviceshaving been tried With indifferent success. For instance in some casesmetal clips have been placed at intervals about the tube and passedthrough the bach, the ends ot said clipsbeing bent over to preventWithdrawal thereof; mother instances the clips ali lill

have been replaced by Wire loops which pass around the tube and throughthe bach and l have their ends twisted about each other.

lloth oi these devices have been found insutlicient by themselves toprevent length wise :movement ot' the tube so that it has been.necessary to term the upper' end ot said t ube w ith a transverse prejection arranged to lit into an opening in, the scale-plate or haelt.lli-lbviously to lin the tube against lengthwise movement, with thisarrangement, it is necei-ssary that the projection lit the openingsnugly at all. points; because olf the varied :torni and coniigurationof the projections, no two being exactly alike, it is necessary, withthe arrangement in question to careiully and individually shape eachopening to correspond with the term oil" the cooperating projection. This operation rerpiires slrill and consumes considerable time which adds'to the cost ot the production ot the then mometer and tor these reasonsis objectionA able. lloth the eli s and the Wires in addi Specificationof Letters Patent.

l atented duly d, timed.,

i919. serial ne. senseo.

tion present an unlinished appearance when the scaleplate is viewed tromthe rear, this being particularly true olf the Wire loops, the twistedends oit which generally stand out trom the rear surface ot said back orscale plate,

'lhe object of my invention is to overcome the above objections and toprovide a construction in which the tube is rigidly lined on the scaleplate particularly against lengthwise movement in a simple, ellicientand attractive manner and at a minimum cost ot production. il turtherobject ot my invention is to provide a construction in which theindicated results are obtained Without the use ot an end projection onthe tube and a cooperating opening in the scale plate. lli/ly inventionwill be fully described hereinafter and the features oil novelty will bepointed out in the appended claim.

lhleterence is to be hadto the accompanying drawings, which torillustrative and de scriptive purposes, show an example of my invention,and in which lfigure l is a tace view et a thermometer scaleplate orback With the tube fastened thereon according to my invention and Fig. 2is a cross-section thereof, on an enlarged scale on the line 2-2 ol Fig.l.

ln the illustrated example, 5 represents the scale-plate orbaclr whichis constructed ot metal and is ot any desired shape and dimensions, saidscale-plate, as usual, being provided on its front tace with thecustomary scale (l. il. thermometer tube 7 of any well linovvnconstruction or type is located upon the liront tace ot' saidscale-plate 5 in proper cooperative relation to the scale G.

ln the present instance the means whereby said tube "2' is lined on saidscale-plate 5 against movement, and more particularly against lengthwiseshitting, relatively to the .sr-,ale G, comprises clips l of relativelysoit metal. rlhe clips 5l entend over the tube 7, preferably at pointsbeyond. the opposite ei ls ot the scale (i, and closely hub said tube,saifrl clips conforming minutely to the form olf the outer surface oi'said tube 7. Members comprising integral parts oi the clips tl extendtherefrom in surface engagement with the plate 5 and are integrallyoined thereto. ln the illustrated example the members 9 extend inopposite directions from the clips 8, in surface engagement with theouter tace ot said scaleplate and are welded to said plate preferably byautogenous welding, which may be caused to form either a continuous bondthroughout said members 9 or to unite the latter to said plate by spotweld ing as desired.

ln applying the clips 8 suitable means are used to cause the same toclosely hug the tube and'to minutely conform to the shape of the outersurface thereof before the union between the members 9 and the plate 5is effected. A frictional engagement of maximum intensity is thussecured between the clips and the tube which remains substantiallyundisturbed during the lite of the thermometer, because of the integralconnection or union between the members 9 oi said clips and the plate 5.rhe tube 7 is thus rigidly fixed on said plate 5 particularly againstmovement in the direction of its vO lengthyrelatively to the scale 6, sothat the accuracy of the thermometer remains unchanged and reliable andaccurate readings are always guaranteed; with thermometers in which thepossibility of a shifting of the tube relatively to the scale exists,the readings are always subject to doubt as will be obvious.

Various changes in the spocilie forni shown and described may be madewithin the scope of the claim without departing from the spirit of myinvention.

I claim:

The combination of a thermometer saaleplate of metal having a scaleproduced on its one face, a thermometer tube on said plate incooperative relation to said scale, metallic clips hugging said tube andron forming minutely to the form ol the outer surface thereof andmembers comprising in tegral parts of said clips and extending insurface engagement with said plate and joined thereto by welding wherebysaid tube is fixed on said srale-plate against lengthwise movementrelatively to said scale.

In testimony whereof I have hereunto set V my hand.

HERBERT I. MILlx' Eli.

